*{
    margin: 0;
    padding: 0;
}
html,body{
width: 100%;
height: 100%;
}
            
a{

    cursor: pointer;
}
ul{

    list-style: none;
}


li {
     margin: 50px 10px;
    height: 50px；
    line-height 50px；
                
             
    background-color: red;


 }

.meal{
      width: 100%;
      height: 100%;
      overflow: hidden;
      
}
 .meal div{
        float: left;
}
 .title{
      width: 30%;
      border-right: 1px solid gold;
      height: 60%;
      overflow: auto;
}




.neirong{
    width: 69%;
    height: 400px;
    
 }

      



.neirong div{
    width: 100%;
    height: 100%;
    background-color: gold;
    display: none;
    line-height: 300px;
    text-align: center;
}
.gold{
     background-color: gold;
}
.neirong .show{
    display: block;
}